Good Energy topped the list, followed by Utility Warehouse and Ecotricity. The survey asked customers to rank their supplier on factors including customer service, value for money and accuracy of bills.

Here’s how they ranked:

Supplier

Customer service score (maximum of five stars)

Value for money score (maximum of five stars)

Bills accuracy and clarity score (maximum of five stars)

Helping you save energy score (maximum of five stars)

Overall customer score

Good Energy

****

***

****

****

84%

Utility Warehouse

****

****

*****

***

78%

Ecotricity

****

***

****

****

77%

Ovo Energy

****

****

*****

***

76%

Ebico

****

****

*****

***

73%

Marks & Spencer Energy

****

***

****

****

57%

Sainsbury's Energy

***

***

****

***

54%

SSE

***

***

****

**

51%

British Gas

***

**

***

***

47%

E.ON

***

***

***

***

47%

First Utility

**

***

****

**

46%

Scottish Power

***

**

**

**

44%

EDF Energy

***

**

**

**

43%

Npower

***

**

**

**

41%

It’s worth noting that the results above are for suppliers operating in England, Wales and Scotland.

A wave of price rises last summer sparked a sharp increase in the number of complaints to Consumer Focus, Consumer Direct and the Energy Ombudsman.

But new research by Which? found that 23% of people did not pursue a complaint against an energy company when they had cause to.

If you have made a complaint your energy company and you feel it hasn’t been dealt with satisfactorily, contact the Energy Ombudsman.

Who do you rate and who do you hate when it comes to energy suppliers? Share your thoughts in the Comments box below.